Within Robopon Sun, Star, and Moon versions, the player assumes the role of a child named Cody, whose grandpa is retiring and gives him the family business, a Robopon Dispatching Company. Cody travels around Porombo Island collecting Robopon and battling against the "Legend 7", the top-ranked Robopon collectors on the island. Each time Cody successfully beats one of the Legend 7, he takes his or her place in the ranking system.

Within Robopon Sun, Star, and Moon versions, the player assumes the role of a child named Cody, whose grandpa is retiring and gives him the family business, a Robopon Dispatching Company. Cody travels around Porombo Island collecting Robopon and battling against the "Legend 7", the top-ranked Robopon collectors on the island. Each time Cody successfully beats one of the Legend 7, he takes his or her place in the ranking system.